-----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Frank Swarbrick Sent: Thursday, July 29, 2010 5:53 PM To: IBM-MAIN@bama.ua.edu Subject: ALTER of open VSAM cluster
It appears we can ALTER FREESPACE while a file is open to CICS (or anywhere else, I assume). Is this an OK thing to do, so the next time the file is reloaded it will use the new freespace values? <SNIP> The ALTER modifies the definition info in the Catalog (as I recall). So the effect is rather immediate. What this will do is allow you to LOAD with x y for freespace, and then when running change to m n for freespace. So, let us say that you LOAD a KSDS with FREESPACE(0 0) that has 50 CYLs of data. Once the load is complete you ALTER it to FREESPACE(25 25). You know that the majority of the adds to the file will start in the last 2 cylinders of data (as loaded) and go from there. So the CA/CI splits will start at that point. Regards, Steve Thompson ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
